#include <stdio.h>  
#include <string.h>
using namespace std;
int main() {
    char n[20]; 
    scanf("%s", n);
    int len = strlen(n);  
    if (len == 5) {
        printf("wan\n");
    } else if (len == 6) {
        printf("shi wan\n");
    } else if (len == 7) {
        printf("bai wan\n");
    } else if (len == 8) {
        printf("qian wan\n");
    } else if (len == 9) {
        printf("yi\n");
    } else if (len == 10) {
        printf("shi yi\n");
    }
    return 0;
}
/**************************************************************
	Problem: 1322
	User: fuhoubin
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:1144 kb
****************************************************************/